Geospatial Analysis of Persistent Organic Pollutant Deposit in the Arctic Ecosystems and Environment
|Lead Author||Vladimir A., Kudrjashov|
|Institution Contact||Russian State Hydrometeorological University, Voronezhskaia str., 79, 198007, Saint-Petersburg, Russia|
|Theme||Theme 1: Vulnerability of Arctic Environments|
|Session Name||1.5 Assessment of Environmental Impact of Industrial Activities in the Arctic|
|Abstract text||In the last decades in the whole world there has been permanent growth of industrial activity, mineral mining and agriculture intensification. Various pollutants arise as a result of these processes. They can have negative influence on ecosystems and environment. By means of transboundary transportation these substances enter the Arctic. Among these pollutants there are persistent organic pollutants (POP), which maintain proper activity over a long period of time and also they accumulate in the arctic trophic chain ecosystems and environment.
The following research was carried out with for the purpose of evaluation of POP accumulation and localization in different level trophic chain ecosystems and the environment of the Russian Arctic. POP were represented by as the two toxic anthropogenic chlorinated hydrocarbons with heavy molecular weights: polychlorinated biphenyl (PCB) and dichlorodiphenyltrichloroethane (DDT). The geospatial analysis was fulfilled with the use of calculations of various POP area concentration in the ArcGIS software environment. The data obtained were expressed as the interactive histogram series with additional vertical lines that showed limited concentrations of POP. The same method was applied to the region areas in which the POP concentration exceed the limited concentrations or it was within the normal values. The geospatial analysis was executed for sea water, sea-bed sediments, components of trophic chains in the sea and terrestrial ecosystems.
Various calculations, data analysis and modelling were executed by means of Excel package and R software environment. The accumulation coefficients of PCB and DDT in the various level trophic chain ecosystems and also in the environments was calculated. An obtained data analysis gave the opportunity to establish the biomagnification effect for POP accumulation in the ecosystems. By the use of data modelling it was recognized that there is exponential character of the POP accumulation in the trophic chains of arctic ecosystems and environment.